Frontend work

what does it do:
      - adds "create work" action to the nav bar, with redirection to the work page
      - allows to edit work details and delete work
      - on delete, you can go back in the nav history
      
remember to `npm install` and `make modules=frontend`
It is a bit iffy to put a message straight into the HTML like this without using $().text(), as it should be plain text and might contain something that breaks the HTML.